DE3311303A1 - CONNECTORS FOR THE ROTATING CONNECTION OF WIPER ARMS TO WIPER BLADES - Google Patents

Description

Dr.H./Lu

Trico-Folberth Limited

Great West Road,

Brentford, Middlesex TW 8 9 HP

England

ⁿ Connection pieces for the rotatable connection of wiper arms with wiper blades ^w

The invention relates to improvements in connectors for rotatably connecting wiper arms to wiper blades. "-, ... ■ - ^: ';;" ■ "" / ·. -.:'-'■ '

It is known that there are commercial advantages when it is possible to rotatably connect a single connector to different types of wiper arm ends with different types of wiper blades,

^M ost Wi shear arm end »» can be classified as straight or hook-shaped types. The straight type consists of a flat steel rod of rectangular cross-section and is provided with a small locking protrusion on its surface.

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This type is also known as the bayonet type. The hook type also consists of a flat steel rod of rectangular cross-section, but has an upper straight one Part, which is the continuation of the main part of the arm and a lower part parallel to the upper part, The two parts are connected by a curve part via a curve of 180 °.

The lower straight part either has an opening for one handle with a lock as in the U-hook type or two side by side bent down at their end Tines that are separated by a slot and are called the Oucellier hook type.

Any of these straight or hook types of arm end can be rotated by a suitable intermediate link be connected to a pivot pin, which has a Mitt < opening bridged in a main yoke of a wiper blade or with a pivot pin that protrudes from the side of the wiper blade.

Further, each of these types of arm ends can be classified as downwardly angled or not downwardly angled den, i.e. that one end of the wiper blade in question is parallel or inclined downwards with respect to the angi the end of the wiper arm. The need for an upward curve of the end of the arm occurs particularly with the eggs that of straight wiper arms that are mounted from above onto the associated wiper blade.

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'. The downward angling creates adequate leeway to allow a rotary movement between the

Allow wiper blade and arm.

5 Published British patent application GB 2 073 583 A

shows a connector with alternative bearings for

I Receipt of the pivot pin, which opens an opening in a

ί shear blade spanned. One of these camps is higher

j as the other and is used when the connection-.

jio piece is intended to accommodate a hook-type arm. The connection ^ -

! training piece then has a lower working layer between

: the walls delimiting the opening. Still exists

j there is enough space for rotation during loading

^; shoot between the main part of the arm and the leaf,

15 without the end of the arm being bent downwards. The un-

'. The lower bearing is used to turn the connector into a

■ Bringing a working position in which there is enough over

j the wiper blade protrudes to allow a

straight arm rotates during operation without

2o the end of the arm is angled downwards.

; In contrast, in a first embodiment • the subject matter of the invention a connector for the rotatable connection of a wiper arm end with a wiper J25 sheet a bearing for receiving a pivot pin on the

Wiper blade, furthermore a first guide, which consists of first stop surfaces in connection with the first locking means, around a wiper arm end of the hook type to locate and detachably fasten and also Ϊ3ο a second guide consisting of second stop surfaces

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in connection with second locking means to a Locating and detachable wiper arm end of straight type to attach, the distinguishing feature is that the second guide in relation to the first Leadership is inclined.

The first basic idea of the invention thus makes it possible to make the connecting piece compact and at the same time to enable the wiper blade mounted from above to have sufficient working leeway with respect to the Connector has, even if the end of the arm is straight and not bent.

It is also known to have commercial advantages when a single connector can be used to attach different sizes of wiper arm ends, especially different sizes of arms of the hook type, in which the bar material differed

2.0 ' borrowed width and the curved parts of the hook have corresponding different radii of curvature.

British published patent application GB 2 073 583 A shows a connector for attaching a Wiper blade from above, with which different sizes of the Ducellier hook type can be picked up by the ends of the wiper arm are. Two locking elements are opposite to each other on resiliently deformable side portions of the compound. ' Arranged in pieces. During assembly, the presses curved part of the hook pulls the elements and the side parts outwards and passes between the elements

i "- 40.

I The flexibility of the side parts means that

the elements interlock with the outwardly curved surfaces of the hooks when the hooks move to their end position j on the connecting piece. The connector _; 5 can then be rotated into its working position between the walls ι of the blade opening and must for this reason

the connector prior to its connection to the .arm i can be turned into the leaf opening until the side parts come free from the leaf and free from the hook outside

iio can be bent.

i A connector according to the second embodiment ; the invention has a bearing for receiving for the rotatable connection of a wiper arm end with a wiper blade ! 15, a pivot pin on the wiper blade, a set of stop : surfaces which are arranged in planes parallel to a longitudinal axis j of the bearing and a second set of

I hitting surfaces which are arranged in planes perpendicular to the longitudinal axis "'■ of the bearing. The two sets of stop surfaces collectively form a stepped formation and are assigned to locking devices in order to select from a number of differently sized wiper arm ends of the Ducellier! Hook type selected end and detachably attached The essential feature of the invention 25 is that the locking means is a pair

Fingers included which are laterally resilient to j in locking engagement with two adjacent ones i Prongs of different sized Ducellier hooks arm ends

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; The second aspect of the invention thus makes it possible

that the connector for a convenient assembly

CSOP * j

can be constructed so that the pair of resilient fingers can be flexed outwardly even with the connector in its normal operating position between the sidewalls or flanges of a wiper blade. _:

Preferably not only different types, but j different sizes of arm ends can also be accommodated by a single connector. To this end

the first and second features of the invention can j be used in a single connector, which also the other features of the inventive concept or the subclaims may have. For example, the preferred connector can be closed .different times two different sizes of the Ducellier hook type and two different sizes of the Pick up a U-hook type as well as an arm end straight type size.

Preferably, the connecting pieces according to the ^; Invention of both the first and the second embodiment. form and the other features from one piece of j

consist of plastic material.

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In the following, with reference to the drawings only, for example, two connecting pieces according to the invention are described.

In the drawings show:

Fig. 1 : Fig. 2: Fig. 3: Fig. 4: Fig. 5: Fig. 6: Fig. 7:

Fig. 8:

; 25 Fig. 9

Fig.
Fig.

1o:
11:

a diagram of a rectilinear wiper arm; a diagram of a hook-shaped wiper arm end;

a diagram of a so-called Ducellier hook type wiper arm end;

a diagram of a central part of a wiper blade the superimposed genus; a plan view of a connector according to the first embodiment of the invention; a longitudinal section along lines VI - VI of Fig. 5; a bottom view of the connector of Figure 5;

a schematic representation of a connecting piece according to FIG. 5 in longitudinal section, which at is attached to a wiper blade of the superimposed attachment type and not even to one angled, rectilinear wiper arm is connected;

a top view of a connector both the first and the second embodiment of the invention;

a longitudinal section along line X-X of FIG. 9 and a bottom view of the connecting piece according to FIG Fig. 9.

Before describing the two connectors according to the invention it seems appropriate to refer to the distinctive characteristics of the various types of wiper arm ends and to indicate wiper blades which are rotatably connected to one another by the two connecting pieces have to.

Has the end of a straight wiper arm (Flg. 1) a small locking protrusion B on the surface of a flat steel bar of rectangular cross-section.

. The dashed lines show the arrangement when the end of the arm is bent, i.e. tilted downwards in relation to it on the main part of the wiper arm A.

In the case of hook-shaped arm ends (FIGS. 2 and 3), the im Cross-section rectangular bar a hook with a straight upper part T, a curved part C and a lower rectilinear part L parallel to part T. The lower rectilinear part L can be provided with an opening 0 (Fig. 2) and thus form the so-called U-hook type. Instead, the hook end can have two prongs P, which pass through a longitudinal slot S are separated, be provided (Fig. 3). Such an arm is called the Ducellier hook type.

A superimposed type of wiper blade (Fig. K) consists of a main yoke Y in an inverted channel shape with a pivot pin R, which bridges a central opening located between upright flanges F.

A superimposed type of wiper blade (not shown) could be according to the superimposed attachment type

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Fig. 4 is similar to leg, but the pivot pin would be arranged laterally on the outside of the main yoke. A connecting piece 1o according to the first embodiment of the invention (Fig. 5-8) can be molded in one piece from plastic ^: 5 material, for example cast.

The connector 1o may be a body 12 in block form be considered. A bearing 14 extends through the body 12 and has a mouth 16 for opening take a pivot pin of a wiper blade.

The upper surface, the left portion and the bottom of the body \ (in Fig. 6) form continuous stop faces 18, which the bearing 14 paral-15 lie in the longitudinal axis 2o Lelen levels. The stop surfaces 18 are framed by lateral flanges 22. These form opposing stop surfaces 24 in planes perpendicular to the axis 20. The channel formed by the stop surfaces 18 and 24 forms a first guide for receiving and securing the end of a wiper arm of a certain size of the U-hook type with the connecting piece.

j. In particular, the top and the left part of the body

I (seen in Fig. 6) are recessed to be uninterrupted

j 25 to form stop surfaces 26 which are parallel in planes

j to the longitudinal axis 2o of the bearing 14.

ι The stop surfaces 26 are limited by opposite

i lowing stop surfaces 28 which are perpendicular in planes

! 3o to the axis 2o. The stop surfaces 18, 24, 26 and

i thus collectively form a graduated training course.

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For example, the straight and curved parts A smaller wiper arm of the U-hook type can be fastened snugly in the channel, which through the stop surfaces and 28 is formed. These surfaces form an optional first guide.

Both sizes of U-hook type wiper arms can be detachably connected to the connector 1o when they, as described above, are used fully and by locking means, which, from a resilient bendable tongue 3o in a recess 32 in the body 12 and with a projection 3A- for snapping into the opening in the lower straight part of the arm end.

When it is attached to the holding piece 1o, the lower one captures right end of the arm shown in Fig. 2, the inclined underside of the projection 34 in Fig. 6 and bends the Zunoe from the unloaded position into the recess of the body 12 when the wiper arm is on the connector is pulled to the right. The projection 34 snaps into locking engagement with the opening 0 in the arm, when the arm moves to its end position on the connection piece.

The connector has a second guide which is adapted to determine the end of a straight arm of a Size and attach. The second guide b consists of a passage with a rectangular cross-section, which extends through the body 12 at an inclination to the first guides, as can be seen from FIG

The passage is made up of opposing parallel lines; striking surfaces 36 are formed which lie in planes parallel to the I longitudinal axis 2o of the bearing 14 and opposite one another _; lying parallel stop surfaces 38 which are perpendicular to the axis 2o of the bearing 14 in planes jj.

An opening 40 extends from the top of the body 12 (Fig. 6) and opens into the upper stop surface! of the passage. Two slots 42 (Fig. 7) extend from PIo of the underside of the body 12 (seen in Fig. 6) and j open into the lower stop C & che 36 of the passage, ι where they form a tongue 44.

The tongue 44 can be flexibly bent downwards from its unloaded position (FIG. 6) 15, while a wiper arm is connected with the straight end to the connector.

^: The arm is inserted into the lower end of the passage.

i The stop B of the arm is at the top. Someone specific

; 2o downward pressure is exerted by the arm on the tongue 44.

j is practicing. When the arm is in its final position in relation

I moved onto the connector ", the stop B snaps

'"into engagement with the opening 4o and the tongue 44 returns in

j returns to its unloaded position and holds stop B

| 25 in opening 4o.

! It is important to note that the attackers

= surfaces 36 and 38 formed second guide to the

i the stop surfaces 18, 24, 26 and 28 formed channel

! 3o guides is inclined.

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^: An advantage of the inclination of the guides is that, even if the wiper arm is is straight and not bent, an appropriate working distance is maintained W, which relative rotational movement clipboard "the main part of the wiper arm A and the main yoke Y of a wiper blade of the superimposed mounting allowed, whose pivot pin R is received by the bearing 14 and whose upright flanges 1o give the connecting piece lateral support and a wide cover, especially if d.

"Io area 46 is exposed (Fig. 8).

It should also be mentioned that no matter what type of arm end, hook-shaped or straight, on the connecting piece is to be attached, only one bearing is required at a time. This fact and the inclination of the guides make it possible it to make the connector compact.

The compactness is achieved in that the second guide is directed so that it does not affect the bearing 14 very much det, but in a straightforward part of the first Führui opens, the tongue 3o lying between the bearing 14 and the second guide.

In order to have good stability for the smaller execution one; Arm with U-hook end that goes through the Stop surfaces 26 and 28 formed channel is inserted expediently, the stop surface 28 has a greater extent towards the main part of the wiper arm.

This can be achieved in that according to FIG. 6 the Stop surfaces 18 rise slightly upwards when they

approach the surface 46.
! If wiper arms with the larger hook end are used, this is done in the areas indicated by the stop surfaces 1

* ¹³ *

and 24 formed channel. The upper and lower straight parts of the wiper arm end diverge slightly. A connector 5o according to the first and second embodiments of the invention (Figs. 9-11) can also be integrally molded from plastic material.

The connecting piece 5o has all the features described above in connection with the connecting piece 1o wnar the.

So that one of the two can be removed from the connector 5o

Sizes of the wiper arm can be fastened with a Ducellier hook end, the connecting piece has 5o further fastening means, namely a pair of fingers 52 with lateral compliance. Any of the fingers 52 can snap into locking engagement with a corresponding nose P at the end of the wiper arm, as shown in Fig. 1o is indicated by dash-dotted lines.

The projection 34 is received through the longitudinal slot S,

; 2o which separates the noses P at the end of the arm (Fig. 3 and 1o). Everyone

; Finger 52 is L-shaped. The shaft 54 of the L consists of the

'■ body 19 in one piece. The leg of the · L has one

'' free end part 56, which extends away from bearing 14

^! stretches and against the corresponding thigh of the other

Finger 52 is inclined. Both the shaft and the

The legs of each finger are yielding laterally. The resilient fingers 52 can through the lower leg on ; The end of a Ducellier hook are pushed outwards; when this is in its end position on the connector is moved, see when the connector 5o its Has working position in the wiper blade opening. This makes

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assembly easier.

The described details of the connector can be modified. For example, the connection; pieces are designed to be more than a skeleton structure Present stop surfaces with interruptions. ;

Furthermore, some of the stop surfaces described can continue "

are allowed, provided that the remaining area-· ^ ₀ chen for holding the wiper arms suffice. . I.

Intended to use any of the above-described connectors for a side mount wiper blade find, it should be provided with thicker flanges 22 to avoid lateral loading when the Take up wiper arm. Further, if a side-mount wiper blade is used, it should be suitable Way the connector can be held along the wiper blade by placing the wiper blade on the free one End of the pivot pin is placed. Furthermore, the safety is improved if the mouth 16 of each connector is omitted, so that the bearing 14 consists of a cylindrical bore.

Claims (1)

331 Expectations: 1. Connector for rotatable attachment of the end a wiper arm on a wiper blade consisting of a bearing for receiving a pivot pin on the wiper blade, a first guide, which consists of first stop surfaces in connection with first locking means! exists to locate and detachably attach the hooked end of a wiper arm, as well as further consisting of a second guide with second stop surfaces in connection with second locking means for locating and detachable fastening of a rectilinear wiper arm, characterized in that the second guide is inclined with respect to the first guide. 2. Connector according to claim 1, characterized in that the second guide extends in one direction which the bearing does not intersect. 3. Connector according to claim 1 or 2, characterized in that that the locking means associated with the first guide generally lie between the bearing and the second guide. 4. Connector according to claims 1-3, characterized in that the second guide consists of a passage exists, which opens into a straight part of the first guide. 5. erbindungastück ^v according to claims 1-4, characterized in that the first guide first of a set Stop surfaces (18, 26) which lie in planes parallel to a longitudinal axis (2o) of the bearing and a set of first stop surfaces (24, 28), which in planes perpendicular to the longitudinal axis (2o) of the bearing, with the two sets of first stop surfaces collectively a step-shaped Form an arrangement around a wiper arm selected from various sizes ■ of wiper arms with hook ends to attach. 6. Connector according to claim 5, characterized in that the stop surfaces (28) of the other Set of first stop surfaces for a smaller wiper arm with a hook end closer to the main part of the The wiper arm. 7. Connector according to claim 1-6, characterized in that the locking means which the are assigned to the first guide, contain a resiliently removable tongue (3o), which in locking engagement with an opening (0) engages in a wiper arm with a hook end. 8. Connector according to claims 1-7, characterized in that the associated with the first guide Locking means including a pair of fingers (52), which are laterally compliant in order to be in locking engagement with adjacent prongs (P) of a wiper arm to come from the Ducellier hook type. COPY 9. Connecting piece according to claim 8, characterized in that the fingers have free ends (56) which oppose one another are inclined (Fig. 11). 1o. Connection piece according to claim 8 or 9t characterized in ", that the fingers are free end portions (56); which extend away from the area of the camp j 11. Connector according to claim 8, characterized in that net that the fingers are L-shaped, that the shaft (5 * 0 in one piece with the connecting piece and that the leg L is a free j has end portion (56) which extends away from the area of the bearing and against the corresponding leg of the other finger is inclined, with both the shaft and the leg, each finger laterally are compliant : 12. Connector according to claim 1-11, characterized in that -2o indicates that the assigned to the second guide Locking means comprise a resiliently bendable tongue (44) and an opening (4o), di Opening (46) opens into the upper stop surface (36) of the passage (38) and the tongue (44) out of it can be moved downwards in the unloaded position, wherein after inserting the arm a certain downward ^; pressure is exerted on the tongue (44) by the wiper arm and the stop (B) of the end of the V-ischerj arm in its end position comes into engagement with the opening (4o) and the tongue (44) in its · unloaded position returns. 13. Connector according to claims 1-12, characterized in that it is formed in one piece / und'aus plastic material. 14. Connector for the rotatable connection of a. Wiper arm with a wiper blade consisting of a bearing for receiving a pivot pin on the Wiper blade, a set of stop surfaces, which are arranged in planes parallel to a longitudinal axis of the bearing and a further set of stop surfaces, which are arranged in planes perpendicular to the longitudinal axis of the bearing and another set of stop surfaces which are arranged in planes perpendicular to the longitudinal axis of the bearing, the two Sets of stop surfaces collectively represent a stepped design and locking means are assigned to them in order to select from a number of different the large wiper arms with Ducellier hook type to select a specific wiper arm and to attach it detachably, characterized in that the locking means includes a pair of fingers (52) which are laterally are resilient, in order to engage, with the adjacent prongs (P) of the different Sizes from Ducellier hook arm ends. 15. Connector according to claim 14, characterized in that the fingers have free end parts (56), which are inclined towards each other. 16. Connector according to claim 14 or 15, characterized in that that the fingers have free end portions (56) which extend away from the area of the bearing. 17. Connector according to claim 14, characterized in that that each finger is L-shaped, with the pin (54) of the L with the connecting piece consists of one piece and the leg of the L is one 5 has free end part (56) which extends from the area de I camp extends and against corresponding vision ! kel of the other finger is inclined, both de Shaft as well as the leg of each finger on the side j are compliant. 18. Connector according to claim 14-17, characterized in that i indicates that the stop surfaces (28) of the other; Set of stop surfaces for a smaller wipe i arm with Ducellier hook type closer to the main part of the 15 wiper arm. : 19. Wiper arm according to claim 14-18, characterized thereby net that the locking means also have a resilient ι ge and bendable tongue, which in locking ! 2o engagement with an opening in a wiper arm end I- of the U-hook type. ^! 2o. Connector according to claim 14-19, characterized denotes overall ¹ in that it consists of one piece and from 25 plastii material. copy